用不同母体制备Bi_(1.7)Pb_(0.3)Sr_2Ca_2Cu_3O_y超导块材  

DIFFERENT PRECURSOR ROUTES TO PREPARE Bi 1.7 Pb 0.3 Sr 2Ca 2Cu 3O y SUPERCONDUCTING BULK MATERIAL

作　　者：孙长勇[1] 王继锁[1] 李丽华[1] 

机构地区：[1]聊城师范学院物理系

出　　处：《低温物理学报》1997年第3期206-210,共5页Low Temperature Physical Letters

摘　　要：采用不同的母体材料，在分别淬火的非晶中间相基础上合成了Ｂｉ１．７Ｐｂ０．３Ｓｒ２Ｃａ２Ｃｕ３Ｏｙ高Ｔｃ超导陶瓷，报道了这些材料的制备、Ｘ射线衍射及电阻率结果．我们用共生长和结构中离子成分的变化对结果进行了讨论．通过对材料结构和性质的分析得出ＳｒＣａＣｕＯ３是最适合２２１２成相的母体．而ＳｒＣｕＯ２是产生２２２３相的最好母体，在４０Ｋ零场中推断的颗粒内临界电流密度Ｊｃ达１０６Ａ／ｃｍ２．igh T c superconducting ceramics Bi 1.7 Pb 0.3 Sr 2Ca 2Cu 3O y have been prepared using different routes based on the synthesis of seperatedly quenched intermediate phase with two, three and four starting materials, respectively. Nearly pure 2223 materials have been produced. XRD and electric resistivity results are reported. Deduced critical current density is higher than 10 6A/cm 2 at 40K. SrCaCuO 3 is found to be a good precursor of 2212 phase while SrCuO 2give rise to the 2223 phase.

关 键 词：(BiPb)SrCCO 超导块材 超导陶瓷 母体材料 高TC 

分 类 号：TM263.051[一般工业技术—材料科学与工程]